The short version
10 companies supply this market — deep enough that no single failure threatens the supply. The price is down 28% over the past year, to $0.4774 per mL. Put together: this looks like a healthy supply — the boring kind, which is exactly what you want. Historically, drugs in this position went on to a new shortage within 90 days about 0.4% of the time — roughly 2× the typical drug (0.1%).
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